/**
 */
package Alloy;


/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Relationship</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * Relationship
 * A relationship (mediation, characterization) obtains in a world if there is a relation of the proper
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link Alloy.Relationship#getClassifier <em>Classifier</em>}</li>
 *   <li>{@link Alloy.Relationship#getSource <em>Source</em>}</li>
 *   <li>{@link Alloy.Relationship#getTarget <em>Target</em>}</li>
 * </ul>
 * </p>
 *
 * @see Alloy.AlloyPackage#getRelationship()
 * @model
 * @generated
 */
public interface Relationship extends ObtainsExpression {
	/**
	 * Returns the value of the '<em><b>Classifier</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Classifier</em>' reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Classifier</em>' reference.
	 * @see #setClassifier(Universal)
	 * @see Alloy.AlloyPackage#getRelationship_Classifier()
	 * @model required="true"
	 * @generated
	 */
	Universal getClassifier();

	/**
	 * Sets the value of the '{@link Alloy.Relationship#getClassifier <em>Classifier</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Classifier</em>' reference.
	 * @see #getClassifier()
	 * @generated
	 */
	void setClassifier(Universal value);

	/**
	 * Returns the value of the '<em><b>Source</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Source</em>' reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Source</em>' reference.
	 * @see #setSource(Variable)
	 * @see Alloy.AlloyPackage#getRelationship_Source()
	 * @model required="true"
	 * @generated
	 */
	Variable getSource();

	/**
	 * Sets the value of the '{@link Alloy.Relationship#getSource <em>Source</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Source</em>' reference.
	 * @see #getSource()
	 * @generated
	 */
	void setSource(Variable value);

	/**
	 * Returns the value of the '<em><b>Target</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Target</em>' reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Target</em>' reference.
	 * @see #setTarget(Variable)
	 * @see Alloy.AlloyPackage#getRelationship_Target()
	 * @model required="true"
	 * @generated
	 */
	Variable getTarget();

	/**
	 * Sets the value of the '{@link Alloy.Relationship#getTarget <em>Target</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Target</em>' reference.
	 * @see #getTarget()
	 * @generated
	 */
	void setTarget(Variable value);

} // Relationship
